Cnidaria Cubomedusae

• Box jellyfish - due to box to box like (i.e, cube-shaped) bell
• 4 tentacles pr tentacle clusters - hang from each 'corner' deliver venom
• Velarium present - pulsation creates powerful jet and fast movement
• True eyes - set in clusters at ends of rhopalia (sensory structures)
• In some species polypoid structure transforms directly to medusa (no strobila)
• mature medusae spermcast eating and internal fertilisation

  embryos released

  plainly emerges from blastocyst

  swimming planula with eye spots

  sessile polyp asexually budding

  polyp metomorphisjg into medusa

  juvenile medusa released
• Life cycle